Year	Percent
1991-01-01	0.27446300000000000
1992-01-01	0.27747400000000000
1993-01-01	0.26806599999999997
1994-01-01	0.17407200000000000
1995-01-01	0.19591100000000000
1996-01-01	0.18582900000000000
1997-01-01	0.17344000000000000
1998-01-01	0.18362100000000000
1999-01-01	0.20284700000000000
2000-01-01	0.19792600000000000
2001-01-01	0.17122100000000000
2002-01-01	0.16802500000000000
2003-01-01	0.12826400000000002
2004-01-01	0.12930200000000000
2005-01-01	0.18560600000000000
2006-01-01	0.14743100000000000
2007-01-01	0.13663499999999998
2008-01-01	0.15179800000000000
2009-01-01	0.17229400000000000
2010-01-01	0.18053400000000000
2011-01-01	0.18753399999999998
2012-01-01	0.19589700000000002
2013-01-01	0.19618300000000000
2014-01-01	0.19827100000000000
2015-01-01	0.21750200000000000